Table 2.
Bias (Identified – Classified), Probability of Correct Classification by Algorithms (Alg[Troiano] and Alg[Choi]) with Window 60-min and 90-min during ~24-h and during Both Monitors-Worn Waking Periods (Waist Monitor).
Bias (min) | Probability of correct classification | ||||||
---|---|---|---|---|---|---|---|
60-min | 90-min | 60-min | 90-min | ||||
Wrist | VM | 24-h | Alg[Troiano] | 77 (84) 19 50 106 a, b, c [−8 to 313] |
17 (45) −4 025 [−34 to 165] |
0.93 (0.07) 0.92 0.96 0.99 [0.71 to 1.00] |
0.98 (0.03) 0.97 0.99 1.00 [0.85 to 1.00] |
Alg[Choi] | 61 (73) 2 43 73 [−8 to 267] |
10 (32) −4 0 15 [−34 to 120] |
0.95 (0.07) 0.95 0.97 0.99 [0.76 to 1.00] |
0.98 (0.03) 0.980.99 1.00 [0.90 to 1.00] |
|||
V | 24-h | Alg[Troiano] | 138 (110) 63 102 183 [0 to 400] |
67 (88) 0 28 99 [−24 to 341] |
0.89 (0.09) 0.87 0.92 0.94 [0.65 to 1.00] |
0.94 (0.07) 0.92 0.95 0.99 [0.71 to 1.00] |
|
Alg[Choi] | 87 (94) 18 49 97 [−8 to 340] |
27 (49) 0 15 28 [−34 to 170] |
0.93 (0.08) 0.93 0.96 0.99 [0.69 to 1.00] |
0.97 (0.04) 0.96 0.98 0.99 [0.86 to 1.00] |
|||
Waist V | 24-h | Alg[Troiano] | 116 (88) 48 112 160 [0 to 349] |
48 (70) 1 31 61 [−25 to 304] |
0.90 (0.07) 0.87 0.90 0.95 [0.70 to 1.00] |
0.95 (0.05) 0.94 0.97 0.98 [0.74 to 1.00] |
|
Alg[Choi] | 40 (47) 14 28 49 [−8 to 230] |
16 (42) 0 2 20 [−29 to 215] |
0.96 (0.04) 0.95 0.97 0.99 [0.80 to 1.00] |
0.98 (0.04) 0.98 0.99 1.00 [0.81 to 1.00] |
|||
awake | Alg[Troiano] | 97 (73) 53 83 131 [0 to 349] |
36 (62) 0 20 46 [−25 to 305] |
0.86 (0.11) 0.82 0.870.92 [0.43 to 1.00] |
0.94 (0.09) 0.92 0.95 1.00 [0.5 to 1.00] |
||
Alg[Choi] | 32 (47) 2 18 40 [−12 to 230] |
12 (43) 0 1 18 [−29 to 215] |
0.95 (0.07) 0.93 0.96 0.99 [0.62 to 1.00] |
0.97 (0.06) 0.96 0.98 1.00 [0.65 to 1.00] |
a – 25th percentile; b – 50th percentile (median); c – 75th percentile.
Values are means (SD), medians, 25th and 75th percentiles; ranges are in square brackets.
V- vertical axis (single); VM - vector magnitude of 3 axes (vertical, horizontal, 3rd) calculated as VM = √x2 + y2 + z2, where x, y and z are the measurements from the 3 axes.